// generics2.rs // // This powerful wrapper provides the ability to store a positive integer value. // Rewrite it using generics so that it supports wrapping ANY type. // // Execute `rustlings hint generics2` or use the `hint` watch subcommand for a // hint. struct Wrapper { value: u32, } impl Wrapper { pub fn new(value: u32) -> Self { Wrapper { value } } } fn main() { // You can optionally experiment here. } #[cfg(test)] mod tests { use super::*; #[test] fn store_u32_in_wrapper() { assert_eq!(Wrapper::new(42).value, 42); } #[test] fn store_str_in_wrapper() { assert_eq!(Wrapper::new("Foo").value, "Foo"); } }